Bottom of the Well
Crawl through the hole and climb down the ladder. Kill the skulltula
then walk straight forward right through the wall in front of you
through an invisible wall. Now you're in the main well room. Watch out
for the giant green flaming skull flying around and just keep running
straight forward through another wall. Now ignore everything in this
room but watch out, there's a small invisible pit right in the center of
the room where all that blood is. Move around the pit and keep moving
forward to the opposite wall and, again, walk through it. Now stand on
the Triforce symbol in front of you and play Zelda's Lullaby. The water
will drain out.
Now turn around and go back through the wall, avoid the pit, through the
next wall, and you're back where you started, except now there's a big
pit in front of you. Fall down it and crawl through the hole that's down
there. Kill the skulltula, climb up the vines and go through the door to
the Bottom of the Well boss. This guy is easy. You can kill the hands
coming out of the ground. If they grab you just wildly mash your buttons
until they let go and keep slashing at them. You don't need to kill the
hands, just the weird thing walking around trying to bite you. Once it's
dead, a treasure box will appear containing the Lens of Truth. Use the
lens of truth in this room and you'll find an invisible treasure box.
Open it for 200 rupees. Now if you wish, you can just leave now by
playing the Prelude of Light